Transom draft-gear.



gq IIIII lII I. IVI. ROHLFING.

TRANsoM DRAFT GEAR.

APPLICATION FILED DEC. 3. 1913.

Patented Aug. 10, 1915.

III

" .II y

` residing at' St.

' and in dotted lines the which cannot `be seen.

bolster taken on li at liney A- y,'Taans'oiu DRAFT-GEAR.

Specification of Letters Patent.

Patented Aug. 10, 1915.

I 4nplieation filed December-3, '1913. Serial o. 804,432.

To all /w/iom ztmag/ concern Be it known that I, 'JOHN M. ROHLFING, Louis, Missouri, and beingy a citizen of the United States, have invented certain new anduseful Improvements in Transom.Draft-Geanof which' the following is a full, clear, and exactl description, suoli as will enable others skilled in the art to which it appertains to make and to uselthe saine, reference being had tov the*V accompanying drawings, which illustrate the preferred form of the invention, though it is to be understood that thcinvention is not limited to the exact'details of construction shown "and'desci'ibed, asitfvis obvious that various modifications thereofwill occur topersons skilled in the art. ,l

In saiddrawings: Figure a plan view ofv one embodiment -of my invention arranged in a castmetal bolster and shows on the left-hand side a horizontal section through the center of the gear on line E-fE of Fig. 2, and on the right-hand side a plan view of the bolster showing the hole F through which parts of the gear are inserted, parts of the gear through the hole. Fig. 2 shows on the left-hand side, a side elevation of the bolster with the gear in dotted lines andthe part of the draft arm l A in section. On thel righthandlside ofthe same gure is' shown a vertical sectionthrough the center of the gear taken on Vline B--B of Fig. 1. Fig. 3 is a 'cross section through the draft gear and.

C-C of Fig. l and as a method of holding the v.spring in place. Fig. l is a section through one of the two tongues L of the draft arm taken on line D-.D of Fig. 1.

This invention relates* to the class of gear known as the transom draft gear in which thebufling and pulling Vstresses to `which a `draft gear is subjected. are applied directly to the transom, or bolster, instead of being showing the strap G transmitted mainly through the center sills to which in ordinary construction the draft sills, with the draft gear, are attached. This, ofcourse, is a great advantage, as by `distributing the stresses through more of extending parts there is less chance ',o'fdisplacingv or breaking the members'. But with such construction there isthe disadvantage of throwing the shocks entirely' against the side of the bolster at the longitudinally tion elements and .by the member N lcured thereto by bolts,

the center causing a horizontal bending moment for which thev ordinary bolster is not designed. ,Vith.

have shown for accomplishing these result-s: In said drawings 'I indicates the fric- J guiding rollers for same which cause I totravel more freely, as will be hereinafter set forth. ,The fric.- tion blocks I are dropped'into the bolster through "the openings F and the rollers J are inserted infl the semicircular )receiving grooves inthe sides of I after which the whole is shoved forward, that is, toward the center of the bolster into the receiving pockets P lformed in the sides of the draft arm J which is formed, with tongues or arms L which have beenv slid through the bolster openings K, one entering on each side of the integral center filler or strut M of the bolster, and joined shown at a casting fitting of the draft thus. affording a limiting stop to vthe forward movement of the draft arm under pulling strains, as said casting N after the draft arm has traveled forward the required distance will butt against rear or inner face Mv of the integral strut M of the bolster. Under butling lthe portion of the draft arm itself will butt against the outer face` M2 of the strut M. The springs H are then inserted in the hole F and held in place by the strap G, which is bolted to the sides of thebolster. The draft arm J is a movable draftsill, and when it is pulled or pushed by the coupler to which it is attached, the V-shaped portion I) pushing against the wedge shaped end of the frictionmember I will force I into recesses N back-into the pocket in the bolster compressat their rear ends y arms and sei I have provided in -during travelof I.

tendency of the gear is gnders,

the engaging portions of the friction elements I and the draft arm will be sliding engagement,- causing friction.

In applying the pull or push to the forward vor wedge shaped end of the friction and spring actuating members I it will be seen that the tendency would be for I to swivel until it bears against the walls of the bolster only ontwo diagonal corners of LI, whichwouldtend to prevent the easy rearward or spring compressing movement o same. The rollers J obviate this as the two diagonal rollers will be the bearing points It will be seen that the to center the coupler, as in casel the draft arm J tends to swivel about the center of the bolster, as when the car travels around a curve, it

would cause compression of the gear andv taken awaythe when the swiveling force is expansion ofthe gear would tend to return the draft arm to its normal position. v

' From the foregoing it will be noted that extending fioatin g member.

the car underframe, a What I claim is: 1.*In .a transom draft gear, a combination comprising a bolster having pockets, an interposed combined center-filler and guide,

' -a draft transmitting member spanning the same, and friction producing elements in said'pockets 'at opposite sides of said draft transmitting member.'

2. In a transom ing longitudinallyextending pockets and an eoptes ofthis patent may be obtained for interposed combined center iller and guide. In combination, a bolster having ockets therein on a common center line, yieldingly held friction producing elements 1n said pockets, a drafttransmitting member movable with relation to said bolster combination a bolster, having pocketed middle portions with suol'.

are pocketed in recesses or pocketssald bolster and said filler guide in the bolster be# draft gear, la bolster havve cents each, by addressing Washington, D. C.

transversely of said pocketsandfriction producing elements carried by" said .draft transmitting member.

l. In combination, a tudinally extending pockets therein, a dra transmitting member y'extending through said bolster, and cooperating longitudinally movable and transversely movable friction producing elements carrled respectivelygm` said pockets and by said draft transmitting members, said friction-'producing elements being normally maintained in alinement.

5. In a transom draft gear, a combination comprising a pocketed transom Vor bolster having a central bolster having longi-l filler intermediate its"4 i pockets, compressible means in `said pockets and a draft member adapted to cause com--` pression of said compressible means.

. ,6. In a comprising a transom draft gear, a combinationv pocketed transom or bolster` having. a central filler intermediate the pockets, compression and friction-producing means m said pockets, and a draft mmets ber movable transversely of said poc and adapted toco-act withsaid compression' and friction-producing means.

7. ,In combination, a bolster tral filler -and pockets in-alinement with said filler, a bifurcated draft transmitting member extending 'through saidl bolster across the mouths of said pockets, ing friction producing elements carried-by ,draft transmitting member, and a tween the bifurcated portions of said draft transmitting member.

8. In combination, abolster, friction blocks carried in said bolster, a bolster c enter filler and a draft member spanning said filler and in frictional contact with said blocks. v e

`9. In combinatiomfa bolster or load-car-4 rying transom, friction bolster and extending into passages extending transversely through the bolster, and a' draft member in frictional engagement with said friction blocks.

the Commissioner of Patenti.

having a cen-f coperatblocksheld in said 

